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7.1.2.2 Rolling Shutter
Shutter
Trigger
Line 1
Exposure
Readout
...
Time
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line n
Line n-3
Line n-2
Line n-1
t
TriggerDelay
For cameras with rolling shutter sensor and set shutter mode Rolling, for each frame each
line begins exposure at an offset equal to each line's readout time. The exposure time for
each line is the same, but the start and end times are staggered. Data readout for each
line begins immediately following the line's exposure. The readout time for each line is the
same, but the start and end times are staggered.
One advantage of a Rolling Shutter is increased sensitivity. However, because exposure
starts at different times throughout the frame, there are known artifacts such as skew,
wobble, and partial exposure.
Notice
Due to technical issues of rolling shutter, a flash control depending on the exposure
time does not make sense. Such cameras should be used in a continuously illuminated
environment.
